Erratum: The Orbital Period of the Accreting Pulsar GX 1+4

Astronomy and Astrophysics – Astrophysics

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In the Letter ``The Orbital Period of the Accreting Pulsar GX 1+4'' by M. G. Pereira, J. Braga, and F. J. Jablonski (ApJ, 526, L105 [1999]), equation (2) should read RL=1.42x1011M1/3X (1+q)1/3q2/3/0.6q2/3+ln(1+q1/3) P2/3d cm. The range of values quoted for RL in the same paragraph in which equation (2) is inserted should read 81-116 Rsolar, with the binary separation ranging from 244 to 288 Rsolar. The last statement of this paragraph should be replaced by ``Thus, the companion is probably filling its Roche lobe and the accretion disk forms mainly from the stream of matter generated at the inner Lagrangian point.'' In the third to the last sentence of the third paragraph of § 3, the phrase ``the red giant radius is probably less than 7% of the binary separation'' should be revised to read ``the red giant radius is probably of the order of 30% of the binary separation.''

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